CN108663700B - GPS signal loss processing system and method - Google Patents

Abstract

The invention provides a GPS signal loss processing system and method for vehicles. The GPS signal loss processing system includes: a road condition acquisition device for acquiring road condition information of the vehicle; a judging module for judging whether the vehicle is in an area where GPS signals are easily lost according to the road condition information, and outputting a first judgment result , and further determine whether the GPS signal of the vehicle is lost when the first determination result is no, and output a second determination result; and a processor for selecting a first process when the first determination result is yes The second processing mode is selected to perform signal recovery processing on the GPS signal when the second determination result is yes. The solution of the present invention saves the number of signal communication on the one hand, and saves the signal storage space on the other hand, thereby reducing the storage pressure, and the system has a simple structure and a simple method flow.

Description

A GPS signal loss processing system and method

technical field

The invention relates to the technical field of car navigation, in particular to a GPS signal loss processing system and method.

Background technique

A system that uses GPS positioning satellites to locate and navigate in real time around the world is called the Global Positioning Satellite System, or GPS for short. GPS is an all-round, all-weather, all-time, high-precision satellite navigation system developed and established by the US Department of Defense. It can provide global users with low-cost, high-precision three-dimensional position, speed and precise timing and other navigation information. The application model of satellite communication technology in the field of navigation has greatly improved the informatization level of the earth's society and effectively promoted the development of the digital economy. At present, GPS has been widely used in mobile terminals, automobiles and other application fields.

"Lost star" means that the GPS signal is lost, resulting in inability to locate or inaccurate positioning. For example, when a car enters a place with basically no signal, such as a tunnel, it cannot obtain the address GPS signal in time or the GPS signal is disordered, which leads to the deviation of the GPS track on the map. Signal superposition makes it impossible to update the navigation map in a timely and accurate manner.

SUMMARY OF THE INVENTION

An object of the first aspect of the present invention is to solve the technical problem that the GPS signal in the prior art is easily lost in a special area.

A further object of the first aspect of the present invention is how to deal with the GPS signal after the loss of a special area to reduce the number of communications and reduce the pressure of data storage.

The object of the second aspect of the present invention is to provide a simple method of recovering lost GPS signals.

The present invention provides a GPS signal loss processing system for vehicles, comprising:

a road condition acquiring device for acquiring road condition information of the vehicle;

A judgment module, used for judging whether the vehicle is in an area where GPS signals are easily lost according to the road condition information, and outputting a first judgment result, and further judging whether the GPS signal of the vehicle is lost when the first judgment result is no , and output the second judgment result; and

a processor, configured to select a first processing mode to perform signal recovery processing on GPS signals when the first determination result is yes, and select a second processing mode to perform signal recovery processing for GPS signals when the second determination result is yes .

Optionally, the processor is configured to, in the first processing mode, disconnect the search request of the GPS signal of the vehicle until the vehicle is about to leave the area where the GPS signal is prone to be lost, and send the search request. the above search request and clear the previous GPS signal.

Optionally, when the in-vehicle navigation of the vehicle or the navigation device of the mobile terminal is in an on state, the road condition acquisition device is selected as the in-vehicle navigation or the navigation device of the mobile terminal.

Optionally, the processor is configured to determine, according to the speed information of the vehicle and the road condition information obtained by the in-vehicle navigation or the navigation device, the time to drive out of the area where the GPS signal is easily lost, and The search request is sent in advance.

Optionally, when the on-board navigation of the vehicle or the navigation device of the mobile terminal is in an off state, the road condition acquisition device is selected as an image acquisition device for acquiring an environment image.

Optionally, the processor is configured to determine, according to the environmental image acquired by the image acquisition device, whether to drive out of the area where the GPS signal is likely to be lost, and to send the search request in advance.

Optionally, the processor is configured to, in the second processing mode, send a request to clear the previous GPS signal every preset time, and send a request to search for the current GPS signal at the same time, until the current GPS signal is searched. Signal.

In particular, the present invention also provides a GPS signal loss processing method, comprising the following steps:

obtain the road condition information of the vehicle;

According to the road condition information, it is judged whether the vehicle is in an area where GPS signals are easily lost, and a first judgment result is obtained,

When the first judgment result is yes, select a first processing mode to perform signal recovery processing on the GPS signal;

When the first judgment result is no, it is further judged whether the GPS signal of the vehicle is lost, and a second judgment result is obtained, and when the second judgment result is yes, the second processing mode is selected to restore the GPS signal. deal with.

Optionally,

The first processing mode includes:

disconnecting the search request from the vehicle's GPS signal;

Until the vehicle is about to leave the area where the GPS signal is easily lost, the search request is sent again, and the previous GPS signal is cleared.

Optionally, the GPS signal loss processing method further includes the following steps:

After the second processing mode is selected, a request for clearing the previous GPS signal and a request for searching for the current GPS signal are sent every preset time until the current GPS signal is searched.

According to the solution of the present invention, when the vehicle is driving in an area where GPS signals are easily lost, the first processing mode is selected to perform signal recovery processing, and when the vehicle is driving in an area where GPS signals are not easily lost, if the signal is lost, the second processing mode is performed Signal recovery processing, so as to re-search out the GPS signal, and then solve the problem of GPS signal loss during vehicle driving.

When the vehicle enters an area where GPS signals are easily lost, the GPS search signal is disconnected, and a search request is sent in advance when the vehicle is about to leave the area where GPS signals are easily lost. The incoming GPS signal is lost and the signal is disordered, and it can avoid continuous signal transmission and reception when the signal is unstable. Moreover, when the vehicle enters an area where the GPS signal is not easily lost, the lost GPS signal can also be found at a faster speed, thereby improving the user experience. In addition, the system structure of the present invention is simple, and the method flow is simple.

The above and other objects, advantages and features of the present invention will be more apparent to those skilled in the art from the following detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of example and not limitation with reference to the accompanying drawings. The same reference numbers in the figures designate the same or similar parts or parts. It will be understood by those skilled in the art that the drawings are not necessarily to scale. In the attached picture:

1 is a schematic structural block diagram of a GPS signal loss processing system according to an embodiment of the present invention;

FIG. 2 is a schematic flowchart of a method for processing GPS signal loss according to an embodiment of the present invention.

Detailed ways

FIG. 1 shows a schematic structural block diagram of a GPS signal loss processing system according to an embodiment of the present invention. As shown in FIG. 1 , the GPS signal loss processing system includes a road condition acquisition device 10 , a judgment module 20 or a processor 30 , and the road condition acquisition device 10 for acquiring road condition information of a vehicle. The judgment module 20 is used for judging whether the vehicle is in an area where GPS signals are easily lost according to the road condition information, and outputs a first judgment result, and further judges whether the GPS signal of the vehicle is lost when the first judgment result is no , and output the second judgment result. The processor 30 is configured to select a first processing mode to perform signal recovery processing on GPS signals when the first determination result is yes, and select a second processing mode to perform signal recovery processing for GPS signals when the second determination result is yes .

The processor 30 is configured to disconnect the search request of the GPS signal of the vehicle after selecting the first processing mode, and send the search request until the vehicle is about to leave the area where the GPS signal is prone to be lost, and clear the previous GPS signal. In this way, when the vehicle enters an area where GPS signals are easily lost, it can avoid GPS signal loss and signal disorder caused by signal instability, and can avoid continuous signal transmission and reception when the signal is unstable, saving signal communication on the one hand. On the other hand, the signal storage space is saved, thereby reducing the storage pressure.

In one embodiment, when the in-vehicle navigation of the vehicle or the navigation device of the mobile terminal is turned on, the road condition obtaining device 10 is selected as the in-vehicle navigation or the navigation device of the mobile terminal. The processor 30 is configured to determine, according to the speed information of the vehicle and the road condition information obtained by the in-vehicle navigation or the navigation device, the time to leave the area where the GPS signal is easily lost, and send the information in advance. the search request. The in-vehicle navigation or navigation device is in signal communication with the judgment module 20 . When the in-vehicle navigation or the navigation device is turned on, the navigation map can be obtained, so as to obtain the road condition information of the vehicle.

In another embodiment, when the in-vehicle navigation of the vehicle or the navigation device of the mobile terminal is turned off, the road condition acquisition device 10 is selected as an image acquisition device for acquiring an environment image. The processor 30 is configured to determine, according to the environmental image acquired by the image acquisition device, whether to drive out of the area where the GPS signal is easily lost, and to send the search request in advance. The image acquisition device may be, for example, a camera installed in a vehicle, such as a vehicle-mounted recorder.

The processor 30 is configured to, after selecting the second processing mode, send a request for clearing the previous GPS signal and a request for searching for the current GPS signal at preset time intervals until the current GPS signal is searched.

The working principle of the GPS signal loss processing system is described below:

When the judging module 20 judges that the vehicle is in an area where GPS signals are not easily lost, that is, ordinary road conditions, and judges that the GPS signal of the vehicle has been lost, the micro-judgment module 20MCU of the vehicle sends the GPS chip used for acquiring the GPS signal to clear the previous GPS signal The GPS chip receives the clear request and receives the search request for searching the current GPS signal at the same time. After the GPS chip executes the search request, if the MCU receives the GPS signal, it judges that the GPS signal is restored. If the MCU does not receive the GPS signal within a certain period of time, such as 1min, it judges that the GPS signal has not been restored, and the MCU sends the GPS chip again to clear the First, clear the GPS signal and search for the current GPS signal. If the GPS signal is not restored, repeat the above operations until the GPS signal is restored.

When the judging module 20 judges that the vehicle is in an area where GPS signals are likely to be lost, such as tunnel road conditions, and the on-board navigation or the navigation device of the mobile terminal is not turned on, the image acquisition device, such as a driving recorder, judges that the vehicle enters the area where GPS signals are easily lost through the captured images. , the GPS chip transmits the road condition information of the vehicle to the MCU. At this time, the MCU stores the GPS signal that has just entered the area where the GPS signal is easily lost. When the vehicle enters the area where the GPS signal is easily lost, if there is no GPS signal, the MCU will store the GPS signal according to The GPS signal of the vehicle is analyzed and judged to be tunnel road conditions, and signal recovery processing is not performed at this time. When the vehicle is about to leave the tunnel road condition, it is determined whether it is about to leave the GPS signal loss-prone area according to the environmental image obtained by the image acquisition device, and the search request is sent in advance. After the vehicle leaves the tunnel road condition, the normal The GPS signal is lost under road conditions, and covers the GPS signal when you just entered the tunnel. If the GPS signal is not recovered within a certain period of time, such as 20s after exiting the tunnel, the GPS signal recovery process for ordinary road conditions is performed.

When the judging module 20 judges that the vehicle is in an area where GPS signals are easily lost, such as tunnel road conditions, and the on-board navigation or the navigation device of the mobile terminal is turned on, the navigation route information can identify whether the vehicle enters the tunnel road conditions, and when it is judged that it is the tunnel road conditions, do not carry out Signal recovery processing. The MCU calculates the time of the tunnel according to the speed information of the vehicle and the tunnel length information in the navigation to judge the road conditions of the tunnel. After judging that the tunnel has been driven out, the MCU sends the request for searching for GPS signals and clears the GPS signals when entering the tunnel road conditions. , At this time, the MCU judges that it is a normal road condition. At this time, the MCU resumes the processing of the GPS signal. If the GPS signal recovers within a certain time after driving out of the tunnel, such as within 20S, the communication between the GPS chip and the MCU is normal. At this time, the MCU does not send a signal to the GPS chip. command, if it is judged that the GPS signal has not recovered after driving out of the tunnel for a certain period of time, such as 20S, then the above-mentioned ordinary road condition GPS signal recovery process is performed.

Correspondingly, as shown in FIG. 2 , the present invention also provides a method for processing GPS signal loss, including:

Step S100, obtaining road condition information of the vehicle;

Step S200, according to the road condition information, determine whether the vehicle is in an area where GPS signals are easily lost, and obtain a first determination result,

When the first judgment result is yes, select the first processing mode to perform signal recovery processing on the GPS signal;

When the first judgment result is no, it is further judged whether the GPS signal of the vehicle is lost, and a second judgment result is obtained, and when the second judgment result is yes, the second processing mode is selected to perform signal recovery processing on the GPS signal;

Optionally, the GPS signal loss processing method further includes:

Step S201, after selecting the first processing mode, disconnect the search request of the GPS signal of the vehicle;

In step S202, until the vehicle is about to leave the area where the GPS signal is easily lost, a search request is sent and the previous GPS signal is cleared.

Optionally, the GPS signal loss processing method further includes the following steps:

Step S203, after the second processing mode is selected, a request for clearing the previous GPS signal is sent every preset time, and a request for searching for the current GPS signal is sent at the same time, until the current GPS signal is searched.

According to the solution of the present invention, when the vehicle enters the area where the GPS signal is easily lost, the loss of the GPS signal and the disorder of the signal caused by the unstable signal can be avoided, and the continuous transmission and reception of the signal when the signal is unstable can be avoided. On the one hand, the number of signal communications is saved, and on the other hand, the signal storage space is saved, thereby reducing the storage pressure. Moreover, when the vehicle enters an area where the GPS signal is not easily lost, the lost GPS signal can also be found at a faster speed, thereby improving the user experience. In addition, the system structure of the present invention is simple, and the method flow is simple.

By now, those skilled in the art will recognize that, although various exemplary embodiments of the present invention have been illustrated and described in detail herein, the present invention may still be implemented in accordance with the present disclosure without departing from the spirit and scope of the present invention. The content directly determines or derives many other variations or modifications consistent with the principles of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (6)

1. a GPS signal loss processing system for vehicle, is characterized in that, comprises: a road condition acquiring device for acquiring road condition information of the vehicle; A judgment module, used for judging whether the vehicle is in an area where GPS signals are easily lost according to the road condition information, and outputting a first judgment result, and further judging whether the GPS signal of the vehicle is lost when the first judgment result is no , and output the second judgment result; and a processor, configured to select a first processing mode to perform signal recovery processing on GPS signals when the first determination result is yes, and select a second processing mode to perform signal recovery processing for GPS signals when the second determination result is yes ; The processor is configured to, in the first processing mode, disconnect the search request of the GPS signal of the vehicle, and send the search request until the vehicle is about to leave the area where the GPS signal is prone to be lost, and clear the previous GPS signal; The processor is configured to, in the second processing mode, send a request for clearing a previous GPS signal and a request for searching for a current GPS signal at preset time intervals until the current GPS signal is searched. 2 . The GPS signal loss processing system according to claim 1 , wherein when the on-board navigation of the vehicle or the navigation device of the mobile terminal is in an on state, the road condition acquisition device is selected as the on-board navigation or the mobile terminal. 3 . the navigation device of the terminal. 3 . The GPS signal loss processing system according to claim 2 , wherein the processor is configured to, according to the vehicle speed information of the vehicle and the road condition information obtained by the vehicle navigation or the navigation device, 4 . to determine the time to drive out of the GPS signal-prone area, and to send the search request in advance. 4 . The GPS signal loss processing system according to claim 1 , wherein when the on-board navigation of the vehicle or the navigation device of the mobile terminal is in a closed state, the road condition acquisition device is selected as a method for acquiring an environmental image. 5 . image acquisition device. 5 . The GPS signal loss processing system according to claim 4 , wherein the processor is configured to determine, according to the environmental image obtained by the image obtaining device, whether to drive out of the GPS signal easily. 6 . Missing area, and send the search request in advance. 6. a GPS signal loss processing method for vehicle, is characterized in that, comprises the steps: obtain the road condition information of the vehicle; According to the road condition information, it is judged whether the vehicle is in an area where GPS signals are easily lost, and a first judgment result is obtained, When the first judgment result is yes, select a first processing mode to perform signal recovery processing on the GPS signal; When the first judgment result is no, it is further judged whether the GPS signal of the vehicle is lost, and a second judgment result is obtained, and when the second judgment result is yes, the second processing mode is selected to restore the GPS signal. deal with; The first processing mode includes: Disconnect the search request of the GPS signal of the vehicle, until the vehicle is about to leave the area where the GPS signal is easily lost, then send the search request and clear the previous GPS signal; It also includes the following steps: After the second processing mode is selected, a request for clearing the previous GPS signal and a request for searching for the current GPS signal are sent every preset time until the current GPS signal is searched.

Images